Methods and apparatuses for isomerization of paraffins

摘要

Embodiments of methods and apparatuses for isomerization of paraffins are provided. In one example, a method comprises the steps of separating an isomerization effluent into a product stream that comprises branched paraffins and a stabilizer overhead vapor stream that comprises HCl, H2, and C6-hydrocarbons. C6-hydrocarbons are removed from at least a portion of the stabilizer overhead vapor stream to form a HCl and H2-rich stream. An isomerization catalyst is activated using at least a portion of the HCl and H2-rich stream to form a chloride-promoted isomerization catalyst. A paraffin feed stream is contacted with the chloride-promoted isomerization catalyst in the presence of hydrogen for isomerization of the paraffins.

主权项

1. A method for isomerization of paraffins, the method comprising the steps of:
separating an isomerization effluent (42) into a product stream (44) that comprises branched and un-branched paraffins and a stabilizer overhead vapor stream (46) that comprises HCl, H2, and C6− hydrocarbons; separating the stabilizer overhead vapor stream (46) in a first separator at first separation conditions effective to form a liquid stream (54) that comprises C3+ hydrocarbons and a net gas stream (62) that comprises HCl, H2, and C5− hydrocarbons; separating at least a portion of the net gas stream (62) in a second separator at second separation conditions effective to obtain a C5− hydrocarbons-rich stream (79) and an HCl and H2-rich stream (40); activating an isomerization catalyst using at least a portion of the HCl and H2-rich stream (40) to form a chloride-promoted isomerization catalyst; and contacting a paraffin feed stream (22) with the chloride-promoted isomerization catalyst in the presence of hydrogen for isomerization of the paraffins.